X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao106.cox.net ([68.230.241.40] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4485997 for flyrotary@lancaironline.net; Wed, 29 Sep 2010 11:07:02 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.40; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao106.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100929150625.UBIM3042.fed1rmmtao106.cox.net@fed1rmimpo02.cox.net> for ; Wed, 29 Sep 2010 11:06:25 -0400 Received: from BigAl ([72.199.216.236]) by fed1rmimpo02.cox.net with bizsmtp id Cf6Q1f00R56cS2o04f6QMQ; Wed, 29 Sep 2010 11:06:25 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=RFAs0e+2sU49DU7hBECFSPlG3t5ZI1He37/O2GpqT7s= c=1 sm=1 a=61ju2Vd_9Q4A:10 a=lN8H/RjlhkCyIsyuOn2r7w==:17 a=ayC55rCoAAAA:8 a=Ia-xEzejAAAA:8 a=C_IRinGWAAAA:8 a=BMJdI0iGe2vpJ5S7jbwA:9 a=J6IPwU_S8tA6FF2cMM-sPBet8TcA:4 a=CjuIK1q_8ugA:10 a=EzXvWhQp4_cA:10 a=si9q_4b84H0A:10 a=eYIzpHX4UKdOUR6wQwgA:9 a=p_udXZhaaclWqVsCiZUA:7 a=Zcwwq3hGJj_q9ZOujTrcpttENBMA:4 a=lN8H/RjlhkCyIsyuOn2r7w==:117 X-CM-Score: 0.00 Authentication-Results: cox.net; none From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Auto tune/oxygen sensor Date: Wed, 29 Sep 2010 08:06:56 -0800 Message-ID: <28E5A266BECF44BCA0AB60210AFE1A1D@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0014_01CB5FAD.492FA030" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 In-Reply-To: Importance: Normal Thread-Index: Actf4gh/Q1WkhZzUSxWG1B+x+E5B3wADcj8g This is a multi-part message in MIME format. ------=_NextPart_000_0014_01CB5FAD.492FA030 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable =20 I have the BOSCH sensor 11027 and it works fine. That's what I have also; and I think mine has something close to 150 hrs = and still going fine. I seldom burn avgas, so that helps. I think one needs the O2 sensor for auto tune. Yes, it does. As I understand it; with the knobs centered the EM tunes = to mid-range on the O2 sensor; roughly stoichometric. =20 Al =20 =20 Rino ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Wednesday, September 29, 2010 11:05 AM Subject: [FlyRotary] Re: Auto tune/oxygen sensor =20 Bill, if it's a one wire sensor, then just about any of the "universal" = 1 wire O2 sensors you find in your auto store will work.=20 =20 If multiwire (I.e. has a heater element and a separate sensor ground = wire), then you need to get one with the same number of wires. If you get the = same make O2 sensor, then the wires should be the same color. =20 Bosch has a wire chart which tells you which color wire is which - = this may help. I always get a Bosch unit - they might cost a few bucks more, = but they are generally good quality, available anywhere and you can find the wire color code. Here's the wiring color code for the "Universal" Bosch unit. =20 Cable colour allocations for the Universal Oxygen Sensor are as follows, sensor output signal wire =3D black, sensor heater element cables =3D White ( Note - heater is not polarity sensitive ) Sensor signal ground ( where used ) =3D Grey Important: The cable allocations must be assigned correctly. Otherwise the Sensor could be destroyed =20 Don't let them sell you a wide band O2 sensor which a novice parts guy = might try to do because they all have 5 -6 wires and might get confused with a Narrow band O2 sensor with a heater. =20 Ed =20 From: Bill Schertz=20 Sent: Wednesday, September 29, 2010 9:10 AM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Auto tune/oxygen sensor =20 Was going to do some auto tune in the air yesterday, to get to some = regions of the performance map that can't be reached on the ground. =20 Took off and the O2 sensor indication completely disappeared from the = EM-2 display. Did one circuit of the airport and landed. =20 Discovered that the O2 sensor had failed (physically -- the top fell off = and separated from the body). This caused me to raise the following = questions. =20 1. I believe that the oxygen sensor readout is only that, not used by = the EC-2 for control purposes.=20 2. When in auto tune, is the EM-2 looking at the sensor for indications = of which way to adjust the mixture? If not, what is the feedback mechanism? =20 I went to the Auto parts store for a replacement, and ran into the = problem that there are 100's of different oxygen sensors, and they need to know = what car it came from. Anyone have the specs on what this sensor is?=20 =20 =20 Bill Schertz KIS Cruiser #4045 N343BS Phase I testing ------=_NextPart_000_0014_01CB5FAD.492FA030 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

 

I have the BOSCH sensor = 11027 and it works fine.

That’s what I have also; = and I think mine has something close to 150 hrs and still going fine.  I = seldom burn avgas, so that helps.

I think one needs the O2 = sensor for auto tune.

Yes, it does.  As I = understand it; with the knobs centered the EM tunes to mid-range on the O2 sensor; = roughly stoichometric.

 

Al

 

 

Rino

=

----- Original Message = -----

From: Ed Anderson

Sent: Wednesday, September 29, 2010 11:05 AM

Subject: [FlyRotary] Re: Auto tune/oxygen sensor

 

Bill, if it’s a one = wire sensor, then just about any of the "universal" 1 wire O2 = sensors you find in your auto store will work. 

 

 If multiwire (I.e. = has a heater element and a separate sensor ground wire), then you need to get = one with the same number of wires.  If you get the same make O2 sensor, = then the wires should be the same color.

 

  Bosch has a wire = chart which tells you which color wire is which  - this may help.  I = always get a Bosch unit - they might cost a few bucks more, but they are generally = good quality, available anywhere and you can find the wire color code.  = Here's the wiring color code for the "Universal" Bosch = unit.

 

Cable = colour allocations for the Universal Oxygen Sensor are as = follows,

sensor = output signal wire =3D black, sensor = heater element cables =3D

White ( = Note - heater is not polarity sensitive ) Sensor signal = ground

( where = used ) =3D Grey

Importan= t: The cable allocations must be assigned correctly. = Otherwise

the = Sensor could be destroyed

 

Don't let them sell you a = wide band O2 sensor which a novice parts guy might try to do because they all have = 5 -6 wires and might get confused with a Narrow band O2 sensor with a = heater.

 

Ed

 

From: Bill Schertz

Sent: Wednesday, September 29, 2010 9:10 AM

Subject: [FlyRotary] Auto = tune/oxygen sensor

 

Was going to do some auto = tune in the air yesterday, to get to some regions of the performance map that = can't be reached on the ground.

 

Took off and the O2 sensor indication completely disappeared from the EM-2 display. Did one circuit = of the airport and landed.

 

Discovered that the O2 = sensor had failed (physically -- the top fell off and separated from the body). = This caused me to raise the following questions.

 

1. I believe that the = oxygen sensor readout is only that, not used by the EC-2 for control purposes. =

2. When in auto tune, is = the EM-2 looking at the sensor for indications of which way to adjust the = mixture? If not, what is the feedback mechanism?

 

I went to the Auto parts = store for a replacement, and ran into the problem that there are 100's of different = oxygen sensors, and they need to know what car it came from. Anyone have the specs on = what this sensor is?

 

 

Bill Schertz
KIS Cruiser #4045
N343BS
Phase I testing

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